Proverbs 12:17 He that speaketh truth sheweth forth righteousness: but a false witness deceit.
18 There is that speaketh like the piercings of a sword: but the tongue of the wise is health.
19 The lip of truth shall be established for ever: but a lying tongue is but for a moment.
In this scripture we a contrasted use of the tongue.
First we will look at the wrong way to use the tongue. People who bear false witness against others makes it seem to the one spoken about that it pierces like a sword but it is not long before the truth comes out and the damage is gone.
Then we those who speak truth which leads to people finding the righteousness God. Also the truth never hurts anybody but more often brings healing to situations. The thing about the truth is that it never fades but will stand forever. It is not hard to remember the truth but lies always have to covered up with other lies.
Luke 6:45 “A good man out of the good treasure of his heart bringeth forth that which is good; and an evil man out of the evil treasure of his heart bringeth forth that which is evil: for of the abundance of the heart his mouth speaketh.”